Observation of flux and circular polarization spectra of white dwarfs with low magnetic fields

被引：0
|
作者：
Friedrich, S [1 ]
Ostreicher, R [1 ]
Schweizer, W [1 ]
机构：
[1] LANDESSTERNWARTE HEIDELBERG, D-69117 HEIDELBERG, GERMANY
来源：
ASTRONOMY & ASTROPHYSICS | 1996年 / 309卷 / 01期
关键词：
line; profiles; stars; individual; PG; 0136+251; 1658+441; KUV; 2316+123; magnetic fields; white dwarfs;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present flux and circular polarization spectra for three magnetic white dwarfs - PG 1658+441, PG 0136+251, KW 2316+123 - with magnetic field strengths between 130 Tesla and 3500 Tesla. In this magnetic field range line profiles are strongly influenced by electric fields of about 10(7) V/m present in the dense atmospheres of white dwarfs. Taking these strong electric fields into account we calculate model spectra to compare them with observed spectra. It could be shown that line broadening due to electric and magnetic fields is sufficient to explain the broad line profiles of PG 1658+441 and PG 0136+251.
引用
收藏
页码：227 / 234
页数：8
相关论文
共 50 条
  • [1] THE PI-LINE POLARIZATION IN MAGNETIC WHITE-DWARFS
    ACHILLEOS, N
    WICKRAMASINGHE, DT
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1995, 272 (01) : 24 - 40
  • [2] DYNAMO GENERATION OF MAGNETIC-FIELDS IN WHITE-DWARFS
    THOMAS, JH
    MARKIEL, JA
    VANHORN, HM
    ASTROPHYSICAL JOURNAL, 1995, 453 (01) : 403 - 410
  • [3] Magnetic fields in White Dwarfs and their direct progenitors
    Jordan, Stefan
    COSMIC MAGNETIC FIELDS: FROM PLANETS, TO STARS AND GALAXIES, 2009, (259): : 369 - 378
  • [4] The origin of the magnetic fields in white dwarfs
    Wickramasinghe, DT
    Ferrario, L
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2005, 356 (04) : 1576 - 1582
  • [5] Upper limits for magnetic fields on pulsating white dwarfs
    Schmidt, GD
    Grauer, AD
    ASTROPHYSICAL JOURNAL, 1997, 488 (02) : 827 - 830
  • [6] New insights on the origin of magnetic fields in white dwarfs
    Wickramasinghe, D. T.
    Ferrario, Lilia
    17TH EUROPEAN WHITE DWARF WORKSHOP, 2010, 1273 : 79 - 84
  • [7] Discovery of magnetic fields in five DC white dwarfs
    Berdyugin, Andrei V.
    Piirola, Vilppu
    Bagnulo, Stefano
    Landstreet, John D.
    Berdyugina, Svetlana V.
    ASTRONOMY & ASTROPHYSICS, 2023, 670
  • [8] Discovery of four white dwarfs with strong magnetic fields by the Hamburg/ESO Survey
    Reimers, D
    Jordan, S
    Koester, D
    Bade, N
    Kohler, T
    Wisotzki, L
    ASTRONOMY & ASTROPHYSICS, 1996, 311 (02) : 572 - 578
  • [9] Electric fields for hydrogen bound-free transitions in magnetic white dwarfs
    Seipp, I
    Schweizer, W
    ASTRONOMY & ASTROPHYSICS, 1997, 318 (03) : 990 - 996
  • [10] Surveying DC white dwarfs for magnetic fields
    Putney, A
    ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1997, 112 (02) : 527 - 556
12345